<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <el-table :data="rileslist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom',i1===0?'bdtop':'']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag>{{item1.authName}}</el-tag>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环嵌套渲染二级权限 -->
                                <el-row :class="[i2===0?'':'bdtop']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="操作" prop="roleDesc">
                    <template slot-scope="scope">
                        <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                        <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                        <el-button type="waring" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>


        <!-- 分配权限的对话框 -->
        <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @close="setRightDialogClosed">
            <!-- //树形控件 -->
            <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="dialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>

    </div>
</template>

<script>
export default {
    data(){
        return{
            //所有角色列表数据
            rolelist:[],
            //控制分配权限对话框的显示和隐藏
            setRightDialogVisible:false,
            //所有权限的数据
            rightslist:[],
            //树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            //默认选中的节点id值
            defKeys:[],
            //当前即将分配权限的角色id
            roled:''
        }
    },
    created(){
        this.getRoleList()
    },
    methods:{
        //获取所有角色的列表
        async getRoleList(){
            const {data:res} = await this.$http.get('roles')

            if(res.meta.status!==200){
                return this.$message.error('获取角色列表失败')
            } 

            this.rolelist=res.data
        },
        //根据id删除对应权限
        async removeRightById(role,rightId){
            const confirmResult=this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err=>err)
            if (confirmResult!=='confirm'){
                return this.$message.info('您取消了删除')
            }

            const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status!==200){
                return this.$message.error('删除权限失败')
            }

            // this.getRoleList()
            role.children=res.data
        },
        //展示分配权限的对话框
        async showSetRightDialog(role){
            this.roleId=role.id
            //获取所有权限数据
            const {data:res} = await this.$http.get('rights/tree')
            if(res.meta.status!==200){
                return this.$message.error('获取权限数据失败')
            }
            
            //把获取到的权限数据 保存到data中
            this.rightslist=res.data

            //递归获取三级节点的id
            this.getLeafKeys(role,this.defKeys)

            this.setRightDialogVisible=true
        },
        //通过递归的形式  获取角色所有的三级权限的id  并保存到defKeys 数组中
        getLeafKeys(node,arr){
            //如果当前 node节点不包含children属性时 则是三级节点
            if(!node.children){
                returm arr.push(node.id)
            }

            node.children.forEach(item=>this.getLeafKeys(item,arr))
        },
        //监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys=[]
        },
        //点击为角色分配权限
        async allotRights(){
            const keys=[
                ...this.$ref.treeRef.
                getCheckedKeys(),
                ...this.$ref.treeRef.
                getHalfCheckedKeys()
            ]

            const idStr=keys.join(',')
        
            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
        
            if(res.meta.status!==200){
                return this.$message.error('分配权限失败')
            }

            this.$message.success('分配权限成功')
            this.getRoleList()
            this.setRightDialogVisible=false
        }
    }
}
</script>

<style lang="less" scoped>
    .bdtop {
        border-top: 1px solid pink;
    }
    .bdbottom {
        border-bottom: 1px solid pink;
    }
</style>